How much space do you need for a home gym or a rowing machine?

Your room's length, width and ceiling against the sizes each brand publishes: which machines fit, which need a higher ceiling, and which can stand upright when you are done.

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Type the size of the room and the height of its ceiling. Each machine is checked against what its maker publishes: the workout area when the brand gives one (Tonal, Bowflex), otherwise the machine's size in use plus the margin you choose. The last column says whether the machine can stand upright under your ceiling.

Which sizes does the check use?

• Tonal 2 hangs on the wall: 50.9 in tall, 21.5 in wide, 5.5 in deep. Tonal recommends a 7 x 7 ft floor area, 7 ft of clear wall and a ceiling of at least 7 ft 10 in; it can still work at 7 ft. Its installers need wood or metal studs 16 to 24 inches apart.
• Speediance Gym Monster 2 stands on the floor: 48.03 x 27.16 x 72.83 in unfolded, 14.56 x 27.16 x 72.83 in folded (about 9.04 sq ft and 2.69 sq ft, as Speediance puts it). No workout area is published, so the margin applies.
• Bowflex publishes workout areas: 148 x 134 in for the Revolution, 112 x 150 in for the Xtreme 2 SE. They are large because the arms and the leg station swing out.
• Rowers are long rather than wide: 82 to 86 inches for the Ergatta and Echelon models in our list. Echelon's page for the Row-4s-10 lists 49 x 25.6 x 16.5 in, which cannot be its rowing length, so that model is left out of the check.

Once a machine fits, the next question is what it costs to run: the cost per workout calculator counts the subscription. Rower sizes side by side are on Concept2 vs Hydrow.